Tag: uses of metals and non metals

Questions Related to uses of metals and non metals

Which of the following when stretched, break into pieces?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Calcium

  2. Phosphorus

  3. Iron

  4. Radium

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Correct Option: B
Explanation:

When sulphur or phosphorus is stretched, they break into pieces. Non metals are non-malleable non-ductile.

Which one is the softest solid non-metal among the following?
Diamond, Oxygen, Sulphur, Bromine

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Diamond

  2. Oxygen

  3. Sulphur

  4. Bromine

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Correct Option: C
Explanation:

Most of the solid non-metals are quite soft. For example - sulphur and phosphorous are solid non-metals which are quite soft.

 Which of the following non-metal is lustrous?

chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Diamond

  2. Iodine

  3. Both $A$ and $B$

  4. None of the above

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Correct Option: C
Explanation:

Diamond and iodine both are non metal and lustrous.

Which of the following is the largest in size?

chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $Br$

  2. $I$

  3. $I^-$

  4. $I^+$

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Correct Option: C
Explanation:

Answer : $I^{\ominus}$

(1) We know that from top to bottom atomic size is increases. So $I$ its having higher atomic size then $Br$.
(2) In $I, I^{\ominus}$ and $I^{\oplus}$
$I^{\ominus}$ have the largest atomic size because $I^{\ominus}$ has one extra electron in its valence shell which lead to increase in atomic size.
$\therefore I^{\ominus} > I > I^{\oplus} > Br$.

Which characteristics are required for a element to behave as electrical conductor?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. It should have valence electron

  2. It should have free electron

  3. It easily provide electron to other element

  4. Both $B$ and $C$

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Correct Option: D
Explanation:

Electrical conductors elements have free electrons, which they can easily provide to conduct electricity. This characteristics are generally available in metals.

Which allotrope of carbon do not conduct electricity?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Graphite

  2. Diamond

  3. Fullerene

  4. Both b and c

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Correct Option: D
Explanation:

Carbon is a non-metal which have allotropic form that is graphite, diamond and fullerene. Out of this three only graphite is conductor of electricity. Diamond and fullerene do not conduct electricity.

Non-metals are brittle while metals are ductile. Why?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Because of lesser extent of bonding in non-metals

  2. Because of greater extent of bonding in non-metals

  3. Because of smaller size of non-metallic atoms

  4. Because of lower conductivity of non-metals

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Correct Option: A
Explanation:

The basic difference between metals and non-metals is the extent of bonding.Metals have very high extent of bonding than that in non-metals which makes the metal malleable. and non-metals brittle.

Which of the following elements cannot be beaten into thin wires?

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $O$

  2. $P$

  3. $S$

  4. All of these

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Correct Option: D
Explanation:

Non-metals are generally non-ductile and cannot be beaten into thin wires. All given elements $O,P,S$ are non metals and do not have property of ductility. 

One metal which is not ductile at room temperature is:

chemistry metals physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. $Cu$

  2. $Sn$

  3. $Pb$

  4. $Hg$

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Correct Option: D
Explanation:

$Hg$ is liquid at room temperature and cannot be beaten into thin wire; thus is not ductile at room temperature. All other metals $Cu, Sn ,  Pb$ are ductile at room temperature. 

Which among the following non-metal is liquid at room temperature?

chemistry composition of matter physical properties of non-metals uses of metals and non metals physical properties of metals and non-metals

  1. Chlorine

  2. Bromine

  3. Mercury

  4. Phosphorous

Show answer
Correct Option: B
Explanation:

Mercury and bromine both are present in liquid state at room temperature but mercury is metal and bromine is non-metal.

So, liquid non-metal at room temperature is bromine.